Sheet-cutting machine



June 17, 19300 E, H, TRUMP 5 1,765,184

- SHEET CUTTIN MACHINE 4 Filed March 8, 192a 2 Sheets-Sheet i I F mm" v I INVENTOR w a 4 zwzzm ATTORNEY June 17, 1930.

H. TRUMP I SHEET CUTTING- MACHINE Filed March 8, 1928 2 Sheets-Sheet, 2

INVENTOR Mflz/mp- ATTORNEY 5 Patented June 17, 1930 PATENT OFFICE ELNO n'. TRUMP, or AKRON, onro SHEET-CUTTING macnmn Application filed March 8, 1928. Serial No. 260,179.

My invention relates to sheet cutting machines and more particularly to a machine for putting rubber sheets lit-predetermined points as it is fed from the usual rubber sheet forming calendar.

An object of the invention is to provide a cutter whereby a length of sheet material will be severed in predetermined lengths.

Further the invention. provides a rotary cutter which is adjustable to sever sheet material in desired uniform length and is also capable of adjustment to sever sheet material of various thicknesses.

With the preceding and other objects an 5 advantages in mind, the-invention consists in the novel combination of elements, constructions and arrangements of parts to be hereinafter specifically referred to, claimed and illustrated in the accompanying drawings,

wherein:

Figure 1 is a view partly inelevation and partly in longitudinal section of my invention; a Figure 2 is a top plan view of the same; Figure 3 is a vertical sectional view taken on line 33 of Figure 1; Fi ure 4 is a perspective of the rotary cuttin nife embodied in the invention, and

igure 5 is a detail sectional view illustrating a different pinion ratio from that disclosed in Figure 1.

( Referring to the invention in detail a pair of horizontally disposed parallel rollers 5,

about which an endless belt 6 is trained, is

journalled in upstanding parallel legs 7. The

endless belt is arranged to receive and carry sheet material such as a'rubber sheet S from a conventional rubber sheet forming calen dar 8 arranged in close proximity to one of the rollers 5.

Arran ed upon opposite sides of the endless belt and etween the parallel rollers is a pair of parallel vertical standards 9, the latterextending above the endless belt and having supporting feet 10 at their lower ends. To pro- 'Vlde a hearing or support for the sheet material while it is being severed, a horizontally disposed roller 11, located in horizontal alinement with the rollers 5'and over which the endless belt passes, is journalled in the vertical standards. At one end this roller is formed with a projecting shaft 12, carrying a drive pinion 13 adjacent its outer end and operatively engaged by oppositely extending sprocket chainslet and 15, respectively, the former engaging the roller 5 at one end of the belt, and the latter operatively engaging the other roller. Power is supplied to the rollers 5 and 11 by means of a sprocket chain 16 engaging one of the rotatable parts of the calendar and the adjacent roller 5.

In order to sever the sheet S into predetermined uniform lengths, a rotary knife blade 17 is mounted above the bearing roller for cooperation therewith in severing the sheet material. For the purpose of rotatably supporting the knife blade it is attached to one face of a horizontaly disposed bar 18, ex-

tending transversely across the endless belt I pinion 20. It therefore follows that the length of each piece of material severed is equal in length to the circumference of this pinion. The invention therefore proposes to govern the length of the out by the employment of a plurality of pinions 20 of various diameters. To permitjnterchanging of the pinion 20, the latter is removably held toits stub shaft by a removable nut 21 threaded on the latter. a 4

To compensate for thevva'riance in the diameters of the pinions20 it is necessary to penetrate the sheet material. For this purpose the stub shafts 19 are journalled in blocks I or bearings 22 vertically movable in parallel vertical slots 23 provided in the standards 9. Toadjust the blocks vertically, a vertically disposed screw 24 is swivelled at its lower end to the upper face of each of the blocks, as at 25. These screws are vertically movable through pairs of parallel ears 26 projecting laterally from the inner face of the standards at their upper ends, and are engaged with internally threaded worm cars 27 held against vertical displacement by each pair of cars. A horizontall disposed worm shaft 28 carrying a hand wli nalled in the upper ends of the standards and engages the worm gears. It will be observed that upon rotation of .thehand wheel the worm gears will be rotated to feed the screws.

26 therethrough, and consequently raise or lower the blocks 22 in synchronism.

To adjust the knife blade relative to the bar 18 to dispose itscutting edge in cutting relation to the sheet material regardless of the diameter of the pinion 20, the knife blade is provided with a plurality of parallel transverse slots 30 through which adjustable fastenings 31, engaging the bar, pass.

It will be manifest that theknife blade will be raised or lowered relative to the bar 18, depending u on the diameter of the pinion 20, employed? In addition to severing the sheet material transversely by the rotatable knife blade, the

sheet material is cut longitudinally by means of a gang of circular cutting knives 32 fixed to a horizontally disposed transverse shaft 33 arranged above the enr'less belt and supported in parallel brackets 34 extending forwardly from the standards. To drive the shaft 33 a sprocket chain 35, engaging the shaft 12, engages this shaft 33.

In the operation of the invention the sheet rubber or other material is advanced longitudinally over the bearing roller by means of the endless belt and at the same time the knife blade approaches the sheet material at a tangent with respect to the periphery of the bearing roller, the sheet material is pinched or severed between the periphery of this roller and the cutting edge.

Whatis claimed is 1. In combination a rotatable work .support, a conveyor movable thereover for moving sheet material in a longitudinal direction, a rotary knife supported above the work support and cooperating therewith inv severing the sheet material in uniform lengths, and means for determining the length of the cutofthe sheet material.

2. In a cutter for severing sheet material, a roller supported in a horizontal plane over which sheet material is fed in a longitudinal eel 29 at one end is jourpath, a vertically adjustable horizontal shaft journalled above the roller, a knife blade carried thereby and mounted for vertical adj ustment thereon, and intermeshing pinions on the roller and shaft, one of which determining the length of the severed pieces of sheet material.

3. In a cutter for severing sheet material, a roller supported in a horizontal plane over which sheet material is fed ina longitudinal path, a vertically adjustable horizontal'shaft journalled above the roller, a vertically adjustable knife'blade carried thereby, intermeshing pinions on the roller and shaft, one of which determining the length of the severed pieces of sheet material, and means for adjusting the shaft towards and away from the roller to permit a pinion of predetermined diameter to be utilized on one of such rotating parts.

4. In a sheet material cutting machine, a

horizontally disposed roller over which sheet material is fed in a longitudinal path, a horizontal shaft above the roller capable of vertical adjustment, a vertically adjustable knife blade attached thereto, and a driven element of .a predetermined diameter removably carried by the shaft whereby to cause the knife to sever the sheet material at predetermined points. A r

5'. In combination a support over which sheet material is advanced longitudinally, a vertically adjustable transverse shaft above the support, a vertically adjustable knife blade projecting at right angles from the shaft and cooperating with thesupport in severing the sheet materialas it is advanced.

6. In combination a support over which sheet material is advanced longitudinaly, a vertically adjustable transver's'e shaft above the support, a vertically adjustable knife blade projecting at right angles from the shaft and cooperating with the support in severing the sheet material as it is advanced, and manually operable means for raising and lowering the shaft.

7. In combination a horizontal roller over which sheet material is advanced in a longitudinal direction and carrying a drive pinion, a horizontal shaft above the roller and adj ust-' able towards and away from the same, a knife carried by the shaft and mounted for vertical adjustment, a driven pinion detachable from the shaft and meshing with the drive pinion, the shaft being adjusted away from the roller to permit a different driven pinion to be substituted for the first, and manually operable means for adjusting the shaft.

8. Incombination a horizontal roller over which sheet material is advanced longitudinally and carrying a drive pinion, a vertical adjustable horizontal shaft above the roller, a driven pinion detachable from the shaft and meshing with the drive pinion, manually operable means for adjusting the shaft to permit a drive pinion of different diameter to be associated with the shaft, a knife blade projecting at right angles from the shaft and cooperating with the roller in severing the sheet material as the latter is advanced, and means for adjusting the knife blade relative to the shaft to dispose its cutting edge in cutting relation to the sheet material regardless of the diameter of the driven pinion.

9. In a rotary cutter, a horizontal bearing roller over which sheet material is fed in a. longitudinal path, a horizontal shaft above the bearing roller, a cutting blade vertically adjustable on the shaft, a driven pinion removably mounted on the shaft for which a pinion of different diameter may be substituted, a drive pinion with which the ELNO H. TRUMP.

driven pinion meshes, vertically adjustable hearings in which the shaft is journalled, a screw swivelled to each bearing, and means for feeding the screws vertically whereby to adjust the shaft to a predetermined height to permit a driven pinion of predetermined diameter to be associated with the shaft.

10. In a rotary cutter, a horizontal bearing roller over which sheet material is fed in a longitudinal path, a horizontal shaft above the bearing roller and driven from the latter, a cutting blade carried thereby and cooperating with the bearing roller in severing the sheet material each complete revolution of the shaft, vertically adjustable bearings in which the shaft is journalled, a screw swivelled to each bearing, and internally threaded elements receiving the screws and geared together for unitary rotation whereby to feed both screws simultaneously to adjust the cutter shaft with relation to the various size gears, and means for adjusting the knife blade relative to the shaft to dispose its cutting edge in cutting relation to the sheet material regardless of the height of the shaft.

11. In a rotary cutter, a horizontal beara ing roller over which sheet material is fed in a longitudinal path, a drive pinion carried thereby, a longitudinal. shaft above the bearing roller, a cutting blade vertically adjustable on the shaft, of drive pinion adapted to be removably mounted on the shaft and mesh with'the drive pinion, a cutting blade carried thereby and cooperating with the bearing roller in severing the sheet material upon each complete revoultion of the shaft, vertically adjustable bearings in which the shaft is journalled, a vertically arranged screw swivelled to each bearing and internally threaded elements receiving the screws and geared together for unitary rotation whereby to feed both screws simultaneously to adjust the shaft to a predetermined elevation so that a driven pinion of predetermined diameter may be mounted on the shaft and mesh with the driven drive pinion.

12. A machine for severing sheet material having, in combination, a belt conveyer for 

